Metallurgical furnace.



G. C. CARSON.

METALLURGICAL FURNACE.

APPLICATION FILED 1AN.15,1907.

Patented Aug. 10, 1915.

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G. C. CARSON.

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GEORGE CAMPBELL CARSON, OF DENVER, COLORADO. v

METALLURGICAL FURNACE.

To all whom it may concern.'

Be it known that I, GEORGE CAMPBELL CARSON, of Denver, Colorado, haveinvented certain new and useful Improvements in Metallurgical Furnaces,whereof the following is a specification.

My invention relates to furnaces for treating molten metals and smeltingores, such,

A for example, asv reverberatory and open hearth furnaces, in which thematerials and products are likely to attack the linings of the furnace.l

In carrying .out my invention I arrange receptacles contiguous to thefurnace, and communicating-with its interior, preferably along thesides, in which receptacles I place refractory materials or ores adaptedto protect the furnace. These materials pass by gravity into the furnaceand form a border or levee resting on the hearth and against the wallsof the furnace, and act as an inside lining to protect the same fromscorification and erosion by the bath, and also from the hightemperatureof the interior of the furnace.

Prior to my invention it was customary to form such a levee' or insidellining by throwing refractory material through doors and across thefurnace against the wall on the opposite side. This is very exhaustingwork -for the laborers to perform;

moreover some of the refractory materialso thrown does not reaclr itsdestination, but.

falls into the bath. This material is not only wasted, but is a positivedetriment as it must be eliminated" by the process, which requires heat,consumes fluxes, absorbs metal from the bath, and adds to vthe slagvolume. All of these objections are avoided by my invention. Othersavings-due to my invention are, the timeilost in ordinary practice inrepairing linings by hand, which it is customaryto do after each heat orskim, and which requires severalminutes to perform; also the cooling ofthe furnace and loss of heat when the doors are opened 'to throw in therefractory material.

By my inventionthe lhard brutal labor of claying up is saved. .The onlyrefractory material lost is thaty which is dissolved from the border bythe bath. The timelost in repairing linings is saved. The heat lostwhile repairs are being made is saved. The metal iuxed and lost byreason of therefractory material falling into the bath and ,neverserving its purpose, is saved.

" Specication of Letters Patent. v

Ishowing a furnace built with through the orifices.

Patented Aug. 10, 19155 Application led January 15, 1907. Serial N o.352,468.

Also, 1n reverberatory practice,

the refractory substances fed in to protect the walls of the furnace,are under the control of the metallurgist, and ideal smelting chargescan be fed, and the portion next to the furnace Wall never reach thepoint of fusion while that portion in the interior of the furnace willbe in a high state of fusion. Furthermore, in some cases, it will beunnecessary to build the furnace Valls with brick, as the refractorymaterial can rest against plates held in place by steel beams,v` whichmay.l also support the roof.

' For further explanation of my invention away with the expense of pur-I refer to the accompanying drawings, in

which l Figure 1 is a cross sectionof a furnace taken through thepassages for refractory `material, and showing brick walls for thefurnace. Fig. 2 is a similarsection, but v steel plates and withoutbrick walls. Fig. 3 is a longitudinal section of a furnace, and showsthe orifices .through which the refractory ma# terial is fed.

In these figures 1 represents the walls of l the furnace, built ofbrick, as in Fig. 1, or of steel plates 1A as in Fig. 2.

2 is the arched roof of the furnace.

3 is the' bath of material undergoing treatment. a

4 represents a series of receptacles ranged along the sides of thefurnace, and containing the protecting or refractory material 5,

which passes into the interior of the furnace .through the orifices 6,and forms the protective coating 7 against the walls and on the bottom.The quantity of material 5 in the receptacles is not important, savethat there must be sufficient weight to force it into thev furnace anddeliver it to th desired points with desirable lrapidity. rl`he materialshould be dry enough not to stick or clog, and sufficiently fine todescend freely 8, 9,10 are the usualbeams and ties which form theskeleton of the furnace, and need not be further described. A

l2 vare holes` through which a bar may be .inserted to loosen anymaterial which be- 15 are gates orI dampers to control the,

How of the refractory material through the feed orifices 6.

In the furnace shown in Fig. 2 I have shown Water cooled sections 16 atthe ends of the roof arch. These are dsirable Where ores, or basicmaterials are fed through the orifices 6, as such materials wouldotherwise attack the bricks of the roof. By supporting the roof o nbrackets secured to the framework of the furnace I avoid the damagecaused by the Working of the brick Walls under the influence of thechanges of temperature, as Well as the injury to them from the strainwhen they are at a high temperature.

In the manufacture of steel; and in some other operations, I divide thehearth into two compartments, as at 17 in Fig. 3, and

line one end With basic and the other end Withi acid materials. I alsoarrange a bridgef18 near the division point. I can thls feed an acidiron, for example, into oneeend and there desiliconize it, and then passit through the bridge to the other end Where it is dephosphorized. Ithus effect great savings in refractory material vand alvoidiilling thehearth with a voluminous s ag. l

Having thus described an embodiment of my invention and believing thatIf have produced novel and valuable improvements in the art to which itpertains, I.claim:-

In ametallurgical furnace having receptacles arranged above the roofthereof, passages from said receptacles leading to said furnacesarranged in such a manner that the material in said receptacles passesout into said furnace by gravity and form the lining thereof.

GEO. CAMPBELL CARSON.

Witnesses:

ELMEn E. MEADE, HARRY ALLEN.

